#include <target/image.h>
+/**
+ * @file
+ * Upper level of NOR flash framework.
+ * The lower level interfaces are to drivers. These upper level ones
+ * primarily support access from Tcl scripts or from GDB.
+ */
+
struct flash_bank *flash_banks;
int flash_driver_erase(struct flash_bank *bank, int first, int last)
/** @todo: handle erasures that cross into adjacent banks */
addr -= c->base;
+ last_addr -= c->base;
for (i = 0; i < c->num_sectors; i++)
{
{
if (image->sections[section_last + 1].base_address < (run_address + run_size))
{
- LOG_DEBUG("section %d out of order(very slightly surprising, but supported)", section_last + 1);
+ LOG_DEBUG("section %d out of order "
+ "(surprising, but supported)",
+ section_last + 1);
+ /* REVISIT this can break with autoerase ...
+ * clobbering data after it's written.
+ */
break;
}
+
+ /* FIXME This needlessly touches sectors BETWEEN the
+ * sections it's writing. Without auto erase, it just
+ * writes ones. That WILL INVALIDATE data in cases
+ * like Stellaris Tempest chips, corrupting internal
+ * ECC codes; and at least FreeScale suggests issues
+ * with that approach (in HC11 documentation).
+ *
+ * With auto erase enabled, data in those sectors will
+ * be needlessly destroyed; and some of the limited
+ * number of flash erase cycles will be wasted...
+ *
+ * In both cases, the extra writes slow things down.
+ */
+
/* if we have multiple sections within our image, flash programming could fail due to alignment issues
* attempt to rebuild a consecutive buffer for the flash loader */
pad_bytes = (image->sections[section_last + 1].base_address) - (run_address + run_size);
padding[section_last] = pad_bytes;
run_size += image->sections[++section_last].size;
run_size += pad_bytes;
- padding[section_last] = 0;
LOG_INFO("Padding image section %d with %d bytes", section_last-1, pad_bytes);
}
/* fit the run into bank constraints */
if (run_address + run_size - 1 > c->base + c->size - 1)
{
+ /* REVISIT isn't this superfluous, given the while()
+ * loop conditions above??
+ */
LOG_WARNING("writing %d bytes only - as image section is %d bytes and bank is only %d bytes", \
(int)(c->base + c->size - run_address), (int)(run_size), (int)(c->size));
run_size = c->base + c->size - run_address;
}
+ /* If we're applying any sector automagic, then pad this
+ * (maybe-combined) segment to the end of its last sector.
+ */
+ if (unlock || erase) {
+ int sector;
+ uint32_t offset_start = run_address - c->base;
+ uint32_t offset_end = offset_start + run_size;
+ uint32_t end = offset_end, delta;
+
+ for (sector = 0; sector < c->num_sectors; sector++) {
+ end = c->sectors[sector].offset
+ + c->sectors[sector].size;
+ if (offset_end <= end)
+ break;
+ }
+
+ delta = end - offset_end;
+ padding[section_last] += delta;
+ run_size += delta;
+ }
+
/* allocate buffer */
buffer = malloc(run_size);
buffer_size = 0;